Three-legged support of mining mechanical face shovel type excavator

Abstract

The three-legged support comprises a front supporting column assembly, a rear pull rod, a connecting casting, a guy rope connecting device and an auxiliary pulley assembly, the front supporting column assembly and the rear pull rod are arranged on a rotary platform in a triangular shape, and the top of the front supporting column assembly is connected with the top of the rear pull rod through the connecting casting. The guy rope connecting device is rotationally arranged on the connecting casting, the auxiliary pulley assembly is arranged at the top of the connecting casting, the rear pull rod comprises a left rear pull rod, a right rear pull rod, a pressing rod and a connecting assembly, the left rear pull rod and the right rear pull rod are symmetrically arranged in a splayed shape, and the pressing rod is arranged between the left rear pull rod and the right rear pull rod through the connecting assembly; the guy rope connecting device comprises a suspension, a balance frame, a limiting pin, a guy rope and a tripod, the balance frame is rotationally arranged on the suspension through the limiting pin, one end of the guy rope is connected with the balance frame, and the other end of the guy rope is connected with the tripod. The device is compact in structure and convenient to mount, the stability is effectively guaranteed, and the manufacturing cost and the transportation cost are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of excavators, and in particular relates to a tripod support for a mining mechanical front shovel excavator. Background Art

[0002] The tripod of a mining mechanical front shovel excavator suspends the crane arm by connecting four fixed-length guy ropes.

[0003] In the prior art, the excavator boom is fixed with a double-leg bracket, the front pressure rod is welded with a solid box section and its support rod into a whole; the rear pull rod is welded with two H-beam steels, and the pin is installed on the rotating platform and the top of the front pressure rod. The guy rope is connected to the balance device, and the balance device is connected to the double-leg bracket through the pin. When the excavator is loaded and shakes left and right, the stability performance is poor, the overall structure occupies a large area of ​​the rotating platform, is not convenient for installation and transportation, and has a high manufacturing cost. Summary of the invention

[0004] In order to at least partially solve the technical problems existing in the above-mentioned prior art, the present invention provides a tripod for a mining mechanical front shovel excavator, wherein the tripod is installed on a rotary platform of the excavator to suspend a crane arm.

[0005] The tripod of a mining mechanical front shovel excavator of the present invention comprises a front support assembly, a rear pull rod, a connecting casting, a guy wire connecting device and an auxiliary pulley assembly, wherein the front support assembly and the rear pull rod are arranged in a triangular shape on the slewing platform, the front support assembly and the top of the rear pull rod are connected through the connecting casting, the guy wire connecting device is rotatably arranged on the connecting casting for suspending a lifting arm, and the auxiliary pulley assembly is arranged on the top of the connecting casting for auxiliary lifting, wherein:

[0006] The rear pull rod comprises a left rear pull rod, a right rear pull rod, a pressure rod and a connecting assembly, wherein the left rear pull rod and the right rear pull rod are symmetrically arranged in an eight-shaped shape, and the pressure rod is arranged between the left rear pull rod and the right rear pull rod through the connecting assembly;

[0007] The tension rope connecting device includes a suspension, a balance frame, a limit pin, a tension rope and a tripod. The balance frame is rotatably arranged on the suspension through the limit pin. One end of the tension rope is connected to the balance frame, and the other end of the tension rope is connected to the tripod.

[0008] Furthermore, in the above-mentioned tripod of a mining mechanical front shovel excavator, two groups of mounting ear plates are symmetrically arranged at the bottom of the connecting casting, and a pin shaft hole is penetrated through the upper end of the connecting casting.

[0009] Furthermore, in the above-mentioned mining mechanical front shovel tripod, the front support assembly includes a support column, a first connecting ear plate, a first hinge shaft and a support, the first connecting ear plate is welded to one end of the support column, the support is welded to the upper end surface of the rotating platform, the first connecting ear plate is connected to the support through the first hinge shaft, and the other end of the support column is welded to the connecting casting.

[0010] Furthermore, in the above-mentioned mining mechanical front shovel tripod, third connecting ear plates are respectively provided at both ends of the left rear tie rod and the right rear tie rod, and a third hinge shaft is provided on the third connecting ear plate. The third connecting ear plate at one end of the left rear tie rod and the right rear tie rod is connected to the mounting ear plate through the third hinge shaft, and the third connecting ear plate at the other end of the left rear tie rod and the right rear tie rod is connected to the inside of the rotating platform through the third hinge shaft.

[0011] Furthermore, in the above-mentioned mining mechanical front shovel excavator tripod, the connecting assembly includes an outer connecting plate, an inner connecting plate, connecting bolts and connecting ear seats, the outer connecting plates are respectively arranged on the outside of the left rear tie rod and the right rear tie rod, the inner connecting plates are respectively arranged on the inside of the left rear tie rod and the right rear tie rod, the outer connecting plate and the inner connecting plate are fixed by the connecting bolts, and the connecting ear seats are welded to the inner connecting plate.

[0012] Furthermore, in the above-mentioned mining mechanical front shovel tripod, fourth connecting ear plates are provided at both ends of the pressure rod, and fourth hinge shafts are provided on the fourth connecting ear plates. The fourth connecting ear plates at both ends of the pressure rod are connected to the connecting ear seats through the fourth hinge shafts.

[0013] Furthermore, in the above-mentioned mining mechanical front shovel excavator tripod, the suspension and the balance frame are both U-shaped, the width of the top opening of the suspension is greater than the thickness of the connecting casting, the suspension is sleeved on the outside of the connecting casting and fixed to the pin hole through a pin shaft, a first axial hole is provided at the bottom of the suspension, and a second axial hole is provided at the bottom of the balance frame, the first axial hole is coaxial with the second axial hole, and the suspension and the balance frame are limit-connected by the limit pin passing through the first axial hole and the second axial hole in sequence.

[0014] Furthermore, in the above-mentioned mining mechanical front shovel excavator tripod, the auxiliary pulley assembly includes a pulley bracket, a middle pulley and a top pulley, the pulley bracket is arranged in a triangular shape, the pulley bracket is welded to the top of the connecting casting, the middle pulley is arranged in the middle of the pulley bracket, and the top pulley is arranged on both sides of the pulley bracket.

[0015] The mining mechanical front shovel excavator tripod of the present invention has the following advantages and beneficial effects:

[0016] The overall structure is simple and compact, and all parts can be disassembled and assembled through the hinge shaft, which is easy to install and transport. The manufacturing cost is low, and the stability of the bracket is effectively improved when the excavator load-bearing boom swings left and right. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings in the following descriptions are only used to further understand the embodiments of the present invention and constitute a part of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0018] Figure 1 It is a front view of the tripod of the mining mechanical front shovel excavator of the present invention;

[0019] Figure 2 It is a left side view of the tripod of the mining mechanical front shovel excavator of the present invention;

[0020] Figure 3 For along Figure 1 The schematic diagram of the AA section structure shows the internal structure of the connection casting;

[0021] Figure 4 For along Figure 1 The schematic diagram of the BB section structure shows the connection structure between the support and the support column;

[0022] Figure 5 For along Figure 2 The CC cross-sectional structure schematic diagram shows the connection structure of the connection components;

[0023] Figure 6 It is a structural schematic diagram of a guy wire connection device of a tripod support of a mining mechanical front shovel excavator of the present invention;

[0024] Figure 7 It is a schematic diagram of the rear tie rod structure of the tripod of a mining mechanical front shovel excavator of the present invention;

[0025] Figure 8 It is a schematic diagram of the compression rod structure of the tripod support of a mining mechanical front shovel excavator of the present invention;

[0026] Fig. 9 The invention discloses an auxiliary pulley assembly for a tripod support of a mining mechanical front shovel excavator.

[0027] Description of reference numerals:

[0028] 100: Rotating platform;

[0029] 1: front pillar assembly, 11: support column, 12: first connecting ear plate, 13: first hinge shaft, 14: support;

[0030] 2: rear tie rod, 21: left rear tie rod, 22: right rear tie rod, 23: third connecting ear plate, 24: third hinge shaft;

[0031] 25: pressure rod, 26: fourth connecting ear plate, 27: fourth hinge shaft;

[0032] 28: connecting assembly, 281: outer connecting plate, 282: inner connecting plate, 283: connecting bolt, 284: connecting ear seat;

[0033] 3: Connecting casting, 31: Mounting ear plate, 32: Pin hole;

[0034] 4: Guy rope connection device;

[0035] 41: suspension, 411: first shaft hole;

[0036] 42: balance frame, 421: second shaft hole;

[0037] 43: limit pin, 44: tension rope, 45: tripod;

[0038] 5: auxiliary pulley assembly, 51: pulley bracket, 52: middle pulley, 53: top pulley. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] like Figures 1 to 9 As shown, the tripod of the mining mechanical front shovel excavator of the present invention comprises a front support assembly 1, a rear tie rod 2, a connecting casting 3, a guy wire connecting device 4 and an auxiliary pulley assembly 5. The front support assembly 1 and the rear tie rod 2 are arranged in a triangle shape on the rotary platform 100. The front support assembly 1 is connected to the top of the rear tie rod 2 through the connecting casting 3. The guy wire connecting device 4 is rotatably arranged on the connecting casting 3 for suspending the boom. The auxiliary pulley assembly 5 is arranged on the top of the connecting casting 3 for auxiliary lifting, wherein:

[0041] The rear tie rod 2 comprises a left rear tie rod 21, a right rear tie rod 22, a pressure rod 25 and a connecting assembly 28. The left rear tie rod 21 and the right rear tie rod 22 are symmetrically arranged in an eight-shaped shape. The pressure rod 25 is arranged between the left rear tie rod 21 and the right rear tie rod 22 through the connecting assembly 28.

[0042] The tension rope connecting device 4 includes a suspension 41, a balancing frame 42, a limit pin 43, a tension rope 44 and a tripod 45. The balancing frame 42 is rotatably set on the suspension 41 through the limit pin 43. One end of the tension rope 44 is connected to the balancing frame 42, and the other end of the tension rope 44 is connected to the tripod 45, so that the crane arm is suspended through the tripod 45.

[0043] Furthermore, in the above-mentioned mining mechanical front shovel tripod, two sets of mounting ear plates 31 are symmetrically arranged at the bottom of the connecting casting 3, and a pin shaft hole 32 is penetrated through the upper end of the connecting casting 3, so as to facilitate the rapid positioning and installation of the rear pull rod 2 and the tension rope connecting device 4 during installation.

[0044] Furthermore, in the above-mentioned mining mechanical front shovel tripod, the front pillar assembly 1 includes a support column 11, a first connecting ear plate 12, a first hinge shaft 13 and a support 14. The first connecting ear plate 12 is welded to one end of the support column 11, and the support 14 is welded to the upper end surface of the rotating platform 100. The first connecting ear plate is connected to the support 14 through the first hinge shaft 13, and the other end of the support column 11 is welded to the connecting casting 3, so that the front pillar assembly 1 can be quickly assembled during installation.

[0045] Furthermore, in the above-mentioned mining mechanical front shovel tripod, third connecting ear plates 23 are respectively provided at both ends of the left rear tie rod 21 and the right rear tie rod 22, and a third hinge shaft 24 is provided on the third connecting ear plate 23. The third connecting ear plate 23 at one end of the left rear tie rod 21 and the right rear tie rod 22 is connected to the mounting ear plate 31 through the third hinge shaft 24, and the third connecting ear plate 23 at the other end of the left rear tie rod 21 and the right rear tie rod 22 is connected to the inside of the rotating platform 100 through the third hinge shaft 24, so that the left rear tie rod 21 and the right rear tie rod 22 can be quickly assembled during installation.

[0046] Furthermore, in the above-mentioned mining mechanical front shovel excavator tripod, the connecting assembly 28 includes an outer connecting plate 281, an inner connecting plate 282, connecting bolts 283 and a connecting ear seat 284. The outer connecting plate 281 is respectively arranged on the outside of the left rear tie rod 21 and the right rear tie rod 22, and the inner connecting plate 282 is respectively arranged on the inside of the left rear tie rod 21 and the right rear tie rod 22. The outer connecting plate 281 and the inner connecting plate 282 are fixed by connecting bolts 283, and the connecting ear seat 284 is welded to the inner connecting plate 282.

[0047] Furthermore, in the above-mentioned mining mechanical front shovel tripod, fourth connecting ear plates 26 are provided at both ends of the pressure rod 25, and fourth hinge shafts 27 are provided on the fourth connecting ear plates 26. The fourth connecting ear plates 26 at both ends of the pressure rod 25 are connected to the connecting ear seats 284 through the fourth hinge shafts 27, so that the pressure rod 25 can be installed quickly during installation. The setting of the pressure rod 25 effectively avoids fatigue fracture of the left rear tie rod 21 and the right rear tie rod 22 due to welding stress, thereby effectively improving the overall safety.

[0048] Furthermore, in the above-mentioned mining mechanical front shovel excavator tripod, the suspension 41 and the balance frame 42 are both U-shaped, the width of the top opening of the suspension 41 is greater than the thickness of the connecting casting 3, the suspension 41 is sleeved on the outside of the connecting casting 3 and fixed through the pin and the pin hole 32, a first shaft hole 411 is provided at the bottom of the suspension 41, and a second shaft hole 421 is provided at the bottom of the balance frame 42, the first shaft hole 411 and the second shaft hole 421 are coaxial, the suspension 41 and the balance frame 42 are connected by limiting pins 43 that pass through the first shaft hole 411 and the second shaft hole 421 in sequence, so that the tripod can be assembled and constructed in sections when suspending the boom, effectively saving installation time.

[0049] Furthermore, in the above-mentioned mining mechanical front shovel tripod, the auxiliary pulley assembly 5 includes a pulley bracket 51, a middle pulley 52 and a top pulley 53. The pulley bracket 51 is arranged in a triangular shape, the pulley bracket 51 is welded to the top of the connecting casting 3, the middle pulley 52 is arranged in the middle of the pulley bracket 51, and the top pulley 53 is arranged on both sides of the pulley bracket 51, so as to assist lifting with the help of the middle pulley 52 and the top pulley 53.

[0050] The principle of improving stability is to utilize the stability principle of the triangle when in use. When the boom swings up and down, the front support assembly 1 supports the connecting casting 3 and the left rear tie rod 21 and the right rear tie rod 22 to ensure the stability of the tripod. When the boom swings left and right, the front support assembly 1 supports the connecting casting 3 and the left rear tie rod 21 or the front support assembly 1 and the right rear tie rod 22 to provide support according to the swinging direction of the boom.

[0051] To sum up, compared with the prior art, the tripod stand for a mining mechanical front shovel excavator of the present invention has the following advantages and beneficial effects: the overall structure is simple and compact, all parts can be disassembled and assembled through a hinge shaft, it is easy to install and transport, the manufacturing cost is low, and the stability of the stand is effectively improved when the excavator load-bearing boom swings left and right.

[0052] It should be noted that, in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tripod for a mining mechanical front shovel excavator, the tripod for a mining mechanical front shovel excavator being installed on a rotary platform of the excavator to suspend a boom, characterized in that: The tripod of the mining mechanical front shovel excavator comprises a front support assembly, a rear pull rod, a connecting casting, a guy wire connecting device and an auxiliary pulley assembly. The front support assembly and the rear pull rod are arranged on the slewing platform in a triangular shape. The front support assembly is connected to the top of the rear pull rod through the connecting casting. The guy wire connecting device is rotatably arranged on the connecting casting for suspending the lifting arm. The auxiliary pulley assembly is arranged on the top of the connecting casting for auxiliary lifting, wherein: The rear pull rod comprises a left rear pull rod, a right rear pull rod, a pressure rod and a connecting assembly, wherein the left rear pull rod and the right rear pull rod are symmetrically arranged in an eight-shaped shape, and the pressure rod is arranged between the left rear pull rod and the right rear pull rod through the connecting assembly; The tension rope connecting device includes a suspension, a balance frame, a limit pin, a tension rope and a tripod. The balance frame is rotatably arranged on the suspension through the limit pin. One end of the tension rope is connected to the balance frame, and the other end of the tension rope is connected to the tripod.

2. The mining mechanical front shovel excavator tripod according to claim 1, characterized in that: Two groups of mounting ear plates are symmetrically arranged at the bottom of the connecting casting, and a pin shaft hole is penetrated at the upper end of the connecting casting.

3. The mining mechanical front shovel tripod according to claim 2, characterized in that: The front support column assembly includes a support column, a first connecting ear plate, a first hinge shaft and a support, the first connecting ear plate is welded to one end of the support column, the support is welded to the upper end surface of the rotating platform, the first connecting ear plate is connected to the support through the first hinge shaft, and the other end of the support column is welded to the connecting casting.

4. The mining mechanical front shovel excavator tripod according to claim 2, characterized in that: The left rear pull rod and the right rear pull rod are respectively provided with a third connecting ear plate at both ends, and the third connecting ear plate is provided with a third hinge shaft. The third connecting ear plate at one end of the left rear pull rod and the right rear pull rod is connected to the mounting ear plate through the third hinge shaft, and the third connecting ear plate at the other end of the left rear pull rod and the right rear pull rod is connected to the inside of the rotating platform through the third hinge shaft.

5. The mining mechanical front shovel tripod according to claim 1, characterized in that: The connecting assembly includes an outer connecting plate, an inner connecting plate, connecting bolts and connecting ear seats, the outer connecting plates are respectively arranged on the outer sides of the left rear tie rod and the right rear tie rod, the inner connecting plates are respectively arranged on the inner sides of the left rear tie rod and the right rear tie rod, the outer connecting plate and the inner connecting plate are fixed by the connecting bolts, and the connecting ear seats are welded to the inner connecting plates.

6. The mining mechanical front shovel tripod according to claim 5, characterized in that: The two ends of the pressure rod are provided with fourth connecting ear plates, the fourth connecting ear plates are provided with fourth hinge shafts, and the fourth connecting ear plates at the two ends of the pressure rod are connected to the connecting ear seats through the fourth hinge shafts.

7. The mining mechanical front shovel tripod according to claim 2, characterized in that: The suspension and the balancing frame are both U-shaped, the width of the opening at the top of the suspension is greater than the thickness of the connecting casting, the suspension is sleeved on the outside of the connecting casting and fixed to the pin hole through a pin shaft, a first axial hole is provided at the bottom of the suspension, and a second axial hole is provided at the bottom of the balancing frame, the first axial hole is coaxial with the second axial hole, and the suspension and the balancing frame are connected in a limited manner by the limit pin passing through the first axial hole and the second axial hole in sequence.

8. The mining mechanical front shovel tripod according to claim 1, characterized in that: The auxiliary pulley assembly includes a pulley bracket, a middle pulley and a top pulley. The pulley bracket is arranged in a triangle shape. The pulley bracket is welded to the top of the connecting casting. The middle pulley is arranged in the middle of the pulley bracket, and the top pulley is arranged on both sides of the pulley bracket.

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